Merge branch '435820-ui-sm-chat' into 'master'

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See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/143037



Merged-by: Aleksei Lipniagov <alipniagov@gitlab.com>
Approved-by: Aleksei Lipniagov <alipniagov@gitlab.com>
Reviewed-by: Mark Chao <mchao@gitlab.com>
Reviewed-by: Aleksei Lipniagov <alipniagov@gitlab.com>
Co-authored-by: lulalala <mark@goodlife.tw>